Optical recording medium and process for producing the same, data recording method and data reproducing method for optical recording medium

Abstract

A supporting substrate 11 and a light-transmitting layer 12, and further between the light-transmitting layer and the supporting substrate 11 a dielectric layer 31, a noble metal oxide layer 23, a dielectric layer 32, a light absorption layer 22 and a dielectric layer 33 in this arranging order when viewed from the light-transmitting layer side are provided. The light absorption layer 22 contains as a main component a material that can be represented by (SbaTe1−a)1−bMAb (wherein MA is an element other than antimony (Sb) and tellurium (Te), 0<a<1 and 0≦b<1), and besides, that is different from an intermetallic compound represented by {(GeTe)c(Sb2Te3)1−c)}dMB1−d (wherein MB is an element other than antimony (Sb), tellurium (Te) and germanium (Ge), c is ⅓, ½ or ⅔, and 0<d≦1).

Description

TECHNICAL FIELD

[0001] The present invention relates to an optical recording medium and a manufacturing method thereof, and more particularly, to an optical recording medium of the type which forms recording marks through the evolution of gas and a manufacturing method thereof. In addition, the invention is concerned with a method of recording data on an optical recording medium and a method of reproducing data recorded on an optical recording medium, and more particularly, with a method of recording data on an optical recording medium of the type which forms recording marks through the evolution of gas and a method of reproducing data recorded on such an optical recording medium. BACKGROUND ART

[0002] In recent years, optical recording media, typified by CDs (Compact Discs) and DVDs (Digital Versatile Discs), have been widely used as recording media for recording high-volume digital data.

[0003] With respect to the CDs, a compact disc of the type which can neither write data once m...

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